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Wyszukujesz frazę "coefficient of performance" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Optimization of thermo-electric coolers using hybrid genetic algorithm and simulated annealing
Autorzy:
Khanh, D. V. K.
Vasant, P.
Elamvazuthi, I.
Dieu, V. N.
Powiązania:
https://bibliotekanauki.pl/articles/230105.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermo-electric coolers
genetic algorithm
simulated annealing
coefficient of performance
rate of refrigeration
fitness function
Opis:
Thermo-electric Coolers (TECs) nowadays are applied in a wide range of thermal energy systems. This is due to their superior features where no refrigerant and dynamic parts are needed. TECs generate no electrical or acoustical noise and are environmentally friendly. Over the past decades, many researches were employed to improve the efficiency of TECs by enhancing the material parameters and design parameters. The material parameters are restricted by currently available materials and module fabricating technologies. Therefore, the main objective of TECs design is to determine a set of design parameters such as leg area, leg length and the number of legs. Two elements that play an important role when considering the suitability of TECs in applications are rated of refrigeration (ROR) and coefficient of performance (COP). In this paper, the review of some previous researches will be conducted to see the diversity of optimization in the design of TECs in enhancing the performance and efficiency. After that, single-objective optimization problems (SOP) will be tested first by using Genetic Algorithm (GA) and Simulated Annealing (SA) to optimize geometry properties so that TECs will operate at near optimal conditions. Equality constraint and inequality constraint were taken into consideration.
Źródło:
Archives of Control Sciences; 2014, 24, 2; 155-176
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation of an adsorption chiller in different cycle time conditions
Autorzy:
Szyc, M.
Nowak, W.
Powiązania:
https://bibliotekanauki.pl/articles/185219.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
adsorption chiller
coefficient of performance
silica gel adsorption
single stage system
adsorpcja
współczynnik wydajności
żel krzemionkowy
Opis:
This paper is devoted to application of adsorption process for cooling power generation in a cooling devices. Construction and working principle of a water-silica gel adsorption chiller has been presented and the basic refrigeration cycle has been discussed. The article outlines behavior of a single-stage adsorption system influenced by changes in cycle time. The effect of cycle time and inlet chilled water temperatures on the main system performance parameters has been analysed.
Źródło:
Chemical and Process Engineering; 2014, 35, 1; 109-119
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling the performance of water-zeolite 13X adsorption heat pump
Autorzy:
Kowalska, K.
Ambrożek, B.
Powiązania:
https://bibliotekanauki.pl/articles/240147.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
desorption
adsorption
mathematical simulation
heat pump
coefficient of performance
desorpcja
adsorpcja
symulacja matematyczna
pompa ciepła
współczynnik wydajności
Opis:
The dynamic performance of cylindrical double-tube adsorption heat pump is numerically analysed using a non-equilibrium model, which takes into account both heat and mass transfer processes. The model includes conservation equations for: heat transfer in heating/cooling fluids, heat transfer in the metal tube, and heat and mass transfer in the adsorbent. The mathematical model is numerically solved using the method of lines. Numerical simulations are performed for the system water-zeolite 13X, chosen as the working pair. The effect of the evaporator and condenser temperatures on the adsorption and desorption kinetics is examined. The results of the numerical investigation show that both of these parameters have a significant effect on the adsorption heat pump performance. Based on computer simulation results, the values of the coefficients of performance for heating and cooling are calculated. The results show that adsorption heat pumps have relatively low efficiency compared to other heat pumps. The value of the coefficient of performance for heating is higher than for cooling
Źródło:
Archives of Thermodynamics; 2017, 38, 4; 191--207
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid cascade refrigeration systems for refrigeration and heating
Autorzy:
Megdouli, K.
Ezzaalouni, Y.
Nahdi, E.
Mhimid, A.
Kairouani, L.
Powiązania:
https://bibliotekanauki.pl/articles/240448.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ejector cycle
heat pump
comparison
refrigerant
coefficient of performance
irreversibility
exergy loss
second law efficiency
pompa ciepła
porównanie
czynnik chłodniczy
współczynnik
efektywność
nieodwracalność
Opis:
In this study a cooling ejector cycle coupled to a compression heat pump is analyzed for simultaneous cooling and heating applications. In this work, the influence of the thermodynamic parameters and fluid nature on the performances of the hybrid system is studied. The results obtained show that this system presents interesting performances. The comparison of the system performances with hydrofluorocarbons (HFC) and natural fluids is made. The theoretical results show that the a low temperature refrigerant R32 gives the best performance.
Źródło:
Archives of Thermodynamics; 2018, 39, 2; 73-95
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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